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#P1403
72cc 47mm big bore cylinder kit for Chinese 4 stroke bikes with GY6 139QMB/QMA type engines.
These kits offer a substantial power increase over the standard 50cc kits and will fit all modern Chinese 50cc 4-stroke mopeds.
As soon as we get new stock for 72cc Big Bore Cylinder Kit- Chinese 4T GY6, we'll send you an email.